Friendship

Most Selfish one letter "I" - Avoid it
Most Satisfactory 2 letters "WE" - Use it
Most Poisonous 3 letters "EGO" - Kill it
Most used 4 letters "LOVE" - value it
Most pleasing 5 letters "SMILE" - Keep it
Fastest spreading 6 letters "RUMOUR" - Ignore it
Hardworking 7 letters "SUCCESS" - Achieve it
Most enviable 8 letterse "Jealousy" - Distance it
Most powerful 9 letters "KNOWLEDGE" - Acquire it
Most divine 10 letters "FRIENDSHIP" - Maintain it